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Investments - Details of Investments Carried at Cost (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment [Line Items]
Investments	$ 26,902	$ 35,721
Other InvestmentsCarrying Value [Member]
Investment [Line Items]
Investments	26,902	35,721
Other Investments Cost [Member]
Investment [Line Items]
Investments	35,725	35,725
Securrency Inc. - Series A Convertible Preferred Stock - Carrying Value [Member]
Investment [Line Items]
Investments	3,588	8,488
Securrency Inc. - Series A Convertible Preferred Stock - Cost [Member]
Investment [Line Items]
Investments	8,112	8,112
Securrency Inc. - Series B Convertible Preferred Stock - Carrying Value [Member]
Investment [Line Items]
Investments	5,500	5,500
Securrency Inc. - Series B Convertible Preferred Stock - Cost [Member]
Investment [Line Items]
Investments	5,500	5,500
Securrency Inc - Convertible Note - Carrying Value [Member]
Investment [Line Items]
Investments	10,051	14,500
Securrency Inc - Convertible Note - Cost [Member]
Investment [Line Items]
Investments	15,000	15,000
Subtotal – Securrency, Inc. - Carrying Value [Member]
Investment [Line Items]
Investments	19,139	28,488
Subtotal – Securrency, Inc. - Cost [Member]
Investment [Line Items]
Investments	28,612	28,612
Fnality International Limited Convertible Note Carrying Value [Member]
Investment [Line Items]
Investments	7,451	6,921
Fnality International Limited Convertible Note Cost [Member]
Investment [Line Items]
Investments	6,863	6,863
Onramp Invest Inc Series A-4 Preferred Stock - Carrying Value [Member]
Investment [Line Items]
Investments	312	312
Onramp Invest Inc - Series A-4 Preferred Stock - Cost [Member]
Investment [Line Items]
Investments	$ 250	$ 250

X

- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(18))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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